Wilbub f



(No Model.)

v W. P. STARR.

VBNTILATOR FOR CARS.

Patented Oct. 18,1881.

1 D, L W e UNITED STATES PATENT OFFICE.

WILBUR F. STARR, CF WEATHERSFIELD, CONNECTICUT, ASSIGNOR TO THE HOPSON & BRAINEBD MANUFACTURING COMPANY, OF SAME PLACE.

VENTILATOR FOR CARS.

SPECIFICATION forming part of Letters Patent No. 248,523, dated October 18, 1881. Application filed August 4, 1881. (No model.)

To all whom it may concern:

Be it known that I, WILBUR F. STARR, of Weathersfield, in the county of Hartford and State of Connecticut, have invented certain new and useful Improvements in Ventilators for Railway-Cars and other Uses, of which the following is a specification.

My invention relates to ventilators composed of a box or frame and a number of slats piv- I0 oted therein so as to open and close like the slats of a blind; and the objects of my invention are to simplify the construction of such ventilators, to prevent the slats from rattling, and to provide simple means of holding the slats in a very secure manner, either open or closed.

The invention consists in the combination, in such a ventilator, of a frame comprising closed bearings for slats at one end and open bearings at the other end, slats having atone end pivots which are inserted into said closed bearings, and having at the other end pivots which rest in said open bearings and pins projectin g eccentrically to said pivots, a bar pro- 2 5 vided with holes receiving said eccentric pins, and a spring or springs for pressing again st the said bar and holding the pivots of the slats in their open bearings. The said bar connects all the slats, so that by means of a handle on the pivot of one slat all the slats may he opened or closed. When the slats are opened the said bar iscarried outward againsttheforce of its spring, and when the slats are turned far enough to bring the eccentric pins beyond the center of 5 the pivots the pressure of said springor springs holds the slats open. I also construct the frame with notches upon opposite sides of each open bearing, against which the eccentric .pins strike in opening and closing, and which form stops 0 for limiting the opening and closing movements of the slats.

In the accompanying drawings, Figure 1 represents a rear View of a ventilator embodying my invention. Fig. 2 represents a transverse section of the ventilator when closed upon the dotted line a: m, Fig. 1, looking in the direction indicated by the arrows. Fig. 3 represents a similar section of the ventilator when open. Fig. 4. represents a similar section of the frame alone; and Fig. 5 represents atransverse section on the dotted line y y, Fig. 1, looking in the direction of the arrows on said line.

Similar letters of reference designate corresponding parts in all the figures.

A designates the frame of the ventilator, which may be of cast-iron or other metal, and B designates slats, which may also be of castiron. The slats B have pivots a cast upon them at each end, and, as generally manufactured, the pivots are inserted into hearings or holes in two strips or bars, which are afterward placed and secured in the frame A.

In my improved ventilator the frame A is provided at one end with closed bearings b and at the other end with open bearings 0, (best shown in Fig. 1,) and the pivots a atone end of the slatsare inserted into the closed bearin gs I), while the pivots at the other end thereof rest in the open bearings c. The slats are opened or closed by being oscillated on their pivots, and each slat is constructed with a rabbeted edge, d, which, in the case of all the slats except one outside one, shuts down over the edge of the adjacent slat, as seen in Fig. 2, and forms a tight joint. The rabbeted edge of one outside slat 7 overlaps the edge of the frame, while the edge of the other outside slat is overlapped by a rabbet upon the edge of the frame. The closed and open bearings 12 0 enable the slats having pivots made integral with them to be placed in the frame by inserting the pivots at one end into the closed bearings and dropping the pivots at the other end into the open bearings. At the end of the slats at which are the open bearings are pins or lugs e, which project from the ends of the slats parallel with and eccentric to the pivots a. All the slats are connected by a bar or rod, C, provided with holes orbearingsf, into whichthe eccentric pins eof all the slats are inserted,and it will therefore be seen 0 that when any one slat is opened or closed the motion is transmitted by the rod or bar C, and all the slats are opened and closed simultaneously. The pivot of one slat is represented as prolonged through the frame, and has a han- 9 5 dle or crank, D, applied to it outside the frame for opening or closing the slats.

The pivots a of the slats B are held in their open bearings c by a flap-spring, E, secured to the frame Aatg, and bears upon the edge of the rod or bar 0. This spring exerts a pressure on the rod or bar G in a direction to hold the pivots of the slats in their open bearings, and as the bar or rod 0 is raised, when the slats are opened the opening is opposed by the spring, and the slats are therefore held closed and all rattling prevented. When a sufiicient force to open the slats is exerted upon the handle D the bar or rod 0 will be lifted and the slats turned until their eccentric pins 0 pass over and beyond the center of thepivots a, whereupon the spring will press down the bar or rod, and thus complete the opening of the slats and hold them open.

It is desirable to limit at least the opening movement of the slats, and preferable, also, to limit their closing movement, without depending on the rabbeted edges of the slats for that purpose; and to effect this 1 form in the fra me, on each side of the open bearings, notches 71/, against which the eccentric pin strikes when the slats are fully open or closed, and which form stops to limit the movement of the slats.

The notches h are shown clearly in Fi 4, and the manner of connecting the slats by the rod or bar 0 is best shown in Fig. 5.

Itis obvious that instead of the spring E a spring or springs of any other kind might be used.

By my invention I provide a very desirable o inserted into the closed bearings, and at the 40 other end similar pivots which are placed in said open bearings, and also having projecting pins eccentric to the last-named pivots, a' connecting rod or bar having holes or bearin gs receiving said eccentric pins, and a spring 5 or springs acting upon said rod or bar for holding the pivots of the slats in their open bearings, substantially as specified.

2. The combination of the frame A, constructed with closed and open bearings 11 0, 50

and with stops it, the slats B, having pivots a and eccentric pins 0, the connecting rod or bar 0, havingholesf, and the spring or springs E, substantially as specified.

WVILBUR F. STARR. Vitnesses:

O. W. CHAPIN, D. G. GORDON. 

